| 摘要 |
PURPOSE:To decrease the number of parts of a circuit, and to reduce the cost price by using commonly one of frequency dividing circuits which divided a reference clock into various frequencies and operating each part, to a buzzer outputting circuit of an alarm, too. CONSTITUTION:A CPU22 of a main control substrate 2 divides a quartz resonator 21 by frequency-dividing circuits 30, 31 and drives motors 3, 5 through driving parts 4, 6. Also, by a program of a memory 28; a data is sent and received to and from a key 11 of a console 1 and a display part 22 through a programmable peripheral (PPL)25 and an interface 29. When a toner run-ou, a paper jam, form run-out, etc. are generated in the course of a copy processing, the PPI25 provides an output to a gate 26, turns on the gate 26 together with an output of the frequency-dividing circuit 31, and raises an alarm 13 through a transistor 27. In such a way, the circuit is simplified, and the cost price is reduced. |
